Results 31 to 40 of about 186,401 (311)

Carrier-envelope offset frequency measurement by means of an external optical resonator

Frontiers in Physics, 2023
A general-purpose method based on the implementation of the asymmetric Pound–Drever–Hall (PDH) technique is proposed to measure the carrier-envelope offset (CEO) frequency of a mode-locked laser using an external optical cavity.
Dario Giannotti, Dario Giannotti, Edoardo Suerra, Edoardo Suerra, Francesco Canella, Francesco Canella, Simone Cialdi, Simone Cialdi, Paolo Laporta, Paolo Laporta, Gianluca Galzerano, Gianluca Galzerano   +11 more
doaj   +1 more source

Recent advances in ultrafast optical parametric oscillator frequency combs

, 2014
We discuss recent advances in the stabilization and application of femtosecond frequency combs based on optical parametric oscillators (OPOs) pumped by femtosecond lasers at 800 and 1060 nm.
Reid, Derryck T.; id_orcid, McCracken, Richard A.; id_orcid, Zhang, Zhaowei   +2 more
core   +1 more source

Intrinsic Temperature and Pressure Compensation of Thin-Film Acoustic Resonators

Applied Sciences
Stabilization of the resonance frequency in thin-film acoustic devices to variations in environmental conditions is commonly reduced to the passive or active compensation of a single factor (usually temperature) and the isolation or addition of a ...
Sergiu Cojocaru
doaj   +1 more source

Efficacy and Safety Analysis of Roxarestat in Regulating Renal Anemia in Patients on Maintenance Hemodialysis

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Objective To compare the efficacy and safety of roxarestat versus recombinant human erythropoietin (rhEPO) in the management of renal anemia in patients undergoing maintenance hemodialysis. Methods This was a prospective, open‐label, randomized controlled trial.
Lingling Chen, Junjie Zhu, Qiaonan Ge
wiley   +1 more source

Slow light frequency reference cavities—proof of concept for reducing the frequency sensitivity due to length fluctuations

New Journal of Physics, 2022
Length changes due to thermo-mechanical noise originating from, for example, Brownian motion are a key limiting factor of present day state-of-the-art laser frequency stabilization using Fabry–Pérot cavities.
Sebastian P Horvath, Chunyan Shi, David Gustavsson, Andreas Walther, Adam Kinos, Stefan Kröll, Lars Rippe   +6 more
doaj   +1 more source

Prognosis of Long‐Term Continuous Renal Replacement Therapy and the Impact of Combined Continuous Intravenous Sodium Infusion Therapy

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Patients requiring long‐term continuous renal replacement therapy (CRRT) generally have poor prognoses. This study evaluated whether adding continuous intravenous sodium infusion (cIVNa) is associated with improved hemodynamics and outcomes in patients undergoing long‐term CRRT for ≥ 7 days.
Akinori Yamaguchi, Atsuyoshi Mita, Kosuke Sonoda, Makoto Harada, Koji Hashimoto, Hiroshi Imamura, Yuji Kamijo   +6 more
wiley   +1 more source

Microgrid-Based Small Modular Reactor for a High-Renewable-Energy Penetration Grid in Ghana

Energies
Achieving the necessary energy balance entails the capacity to adapt both power supply and demand, which is known as flexible operation. At present, the Ghana National Commission on Culture depends on a combination of well-coordinated measures designed ...
Genesis Lord Asiamah, Choong-koo Chang
doaj   +1 more source

Long-term frequency stability of three absolutely referenced lasers at 1547.8 nm located at different places which were separated by 30 Km

, 2022
S.206-211The relative optical frequency stabilities of three optical reference units at 1547.82 nm were examined. The reference units were located at different places in Berlin and connected via several kilometres of optical fibre.
Fischer, U.H.P., Giehmann, L., Rocks, M., Gladisch, A., Helmolt, C. von   +4 more
core  

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

FEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi, Pilar Samperio Ventayol, Natalie Burkard, Nicolas Schlegel, Carmen Aguilar, Sina Bartfeld   +5 more
wiley   +1 more source

Precise Active Frequency Stabilization of a Microwave Cavity

, 2007
In this paper, a system for precise frequency stabilization of a microwave cavity is presented. A cavity mode is probed in transmission, and a phase comparison scheme is used to measure its frequency fluctuations.
Costanzo, Giovanni Antonio, Berutto, Marco, Marco Berutto, Andrea De Marchi, De Marchi, Andrea, Giovanni A. Costanzo   +5 more
core   +1 more source